Rihanna takes a dip in the buff! The singer posted sexy pics from her recent Hawaiian vacation on her Facebook page on April 16 -- including this shot of her taking off her bathing suit top under a waterfall. Looks refreshing!

Lea Michele soaks up the glory of a weekend getaway! After her travel buddy captured her in a Glee-ful moment, the small-screen diva tweeted a pic of herself -- showing her tweeps her svelte physique -- on Feb. 20, and wrote, "@steph_hart catching me taking in the morning view.."

Kourtney Kardashian isn't going to let her pregnancy keep her from rocking a sexy bikini! The reality star -- who is expecting a little girl this summer -- spends some quality time with her boys -- boyfriend Scott Disick and son Mason, 2 -- on Feb. 6 in Mexico.

Looks like Charlie Sheen and ex-wife Denise Richards have put all their past drama behind them and are amicable exes. "What's better than a modern family vacation!?!" Sheen twittered on Dec. 18. "Love spending winter break w/ @denise_richards and my kids!"